Interview Reports

Anthropic — OA Codesignal — Variant 4 — Bank System (AI-Safety Fellow variant, last asked 2026-05-13)

Anthropic — OA Codesignal — Variant 3 — File System (last asked 2026-02-13; L3 helpers reported bug-prone)

Anthropic — OA Codesignal — Variant 2 — Task Manager (TTL + Snapshot, last asked 2026-05-16)

Anthropic — OA Codesignal — Variant 1 — In-Memory Database (canonical, last asked 2026-05-10)

Anthropic — OA Codesignal — OA meta (confirmed)

Anthropic — Behavioral — Your behavioral prep plan (do this — it's the loop's decider)

Anthropic — Behavioral — 4. Recruiter Screen — Why Anthropic Deep-Dive (MEDIUM, last 2026-03-14) ← the gate

Anthropic — Behavioral — 3. Project Deep-Dive — Technical Presentation (MEDIUM, last 2026-05-03) ← highest-leverage

Anthropic — Behavioral — 2. Hiring Manager Round — Behavioral & Collaboration (HIGH, last 2026-05-15)

Anthropic — Behavioral — 1. Culture Round — AI-Safety Alignment (VERY HIGH, last 2026-05-15) ← the decider

Anthropic — Interview Q&A — ONSITE 2 — design REVIEW of an inference API (`因佛伦斯艾皮爱`)

Anthropic — Interview Q&A — ONSITE 1 — coding: process ~1M+ records (`一米几处理`)

Anthropic — Interview Q&A — PHONE SCREEN — practical file coding (TWO variants seen)

Anthropic — Interview Q&A

Anthropic — Mined 1p3a — Entry 2 — Recruiter / HR screen (2026-06-12, Master's, SWE General, online apply NO referral, Pass, switcher)

Anthropic — Mined 1p3a — Index

Anthropic — Question Bank — Your drill plan (most imminent loop → prep hardest)

Anthropic — Question Bank — BEHAVIORAL (4) — this is where loops are won/lost

Anthropic — Question Bank — SYSTEM DESIGN (7) — the Q1–Q5 portal

Anthropic — Question Bank — CODING (20) — the Q1–Q6 portal

Anthropic — Question Bank

Anthropic Technical Phone Screen: File Deduplication with Real Filesystem

Anthropic SDE Onsite: Design Review of Inference API, Large File Processing, and Low Error Tolerance (Pass)

Anthropic Technical Phone Screen: File Dedup with Real Filesystem

Anthropic SDE Onsite (2026 Q2): Design Review & Low Error Tolerance

Anthropic Onsite: Inference API Design Review & Streaming Coding

Anthropic Phone Coding: File Processing with Custom Helpers

Anthropic Phone Coding: File Deduplication with Real Filesystem

Anthropic Recruiter Screen: 'Why Anthropic' Personalization & Collaboration

Anthropic Research: Performance Modeling Matmul Arithmetic Intensity

Anthropic Research: ML Take-Home and Review

Anthropic Research: Mechanistic Interpretability Take-Home

Anthropic Recruiter Screen: Why Anthropic

Anthropic Behavioral: Project Deep-Dive Presentation

Anthropic Behavioral: Hiring Manager Collaboration and Impact

Anthropic Behavioral: Culture and AI-Safety Alignment

Anthropic System Design: Design Doc Review Critique

Anthropic System Design: Data Infrastructure

Anthropic System Design: Prompt Playground Product Design

Anthropic System Design: 1-on-1 Chat System

Anthropic System Design: Model Weight Distribution

Anthropic System Design: Inference API and Batched GPU Serving

Anthropic Perf-Eng: GPU Kernel Optimization Take-Home

Anthropic ML Track: QKV Attention and Einsum

Anthropic ML Track: RL GRPO Debugging

Anthropic OA: In-Memory Database with Time-Travel

Anthropic Coding: Weighted Data Batcher with Checkpointing

Anthropic Coding: Longest-Match Tokenizer with Trie

Anthropic Coding: Distributed Mode and Median Calculation

Anthropic Coding: Stack Trace Reconstruction from Enter/Exit Stream